body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

nav li {
    display: inline;
    margin: 0 10px;
}

nav a {
    color: #fff;
    text-decoration: none;
}

main {
    padding: 20px;
}

h1, h2, h3 {
    color: #333;
}

.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-gap: 20px;
}

.article-item {
    border: 1px solid #ddd;
    padding: 15px;
    border-radius: 5px;
}
.article-item img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 10px;
}


footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}


@media (max-width: 768px) {
    .article-list {
        grid-template-columns: 1fr;
    }
}